Jakub Kicinski [off-list ref] writes:

The public classes live in pyynl.lib, so users had to spell out

  from pyynl.lib import YnlFamily

which I forget at least once a month. Re-export lib's API from
the package __init__ so that

  from pyynl import YnlFamily

works as well. I don't think there was a real reason not to do
this?

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reviewed-by: Donald Hunter <donald.hunter@gmail.com>